TLDR: Transcarent seems disorganized and is under-paying their Flutter engineers, who don't have much experience due to Flutter being a relatively new. Once the engineers have a year or so experience, I would expect massive turnover as they jump ship for 40-50% pay increases from other companies.
The long version:
I got a message on LinkedIn from a recruiter, and later had a phone conversation with her. During the phone conversation, I found out the salary range was a bit low and that my minimum was their maximum. Companies never pay the maximum, so I declined to continue. She assured me that Transcarent would pay my minimum, so I agreed to continue (I should've trusted my instincts).
I met with the hiring manager, who was pretty nice. They gave me a take-home assignment, which took about 3-4 hours.
Next was 3 hours of interviews. By this time in the process, I was talking to other companies with much higher compensation packages. I knew I wasn't going to accept Transcarent offer if they gave one, but decided to continue for the practice and too see if they would actually offer me their maximum (spoiler, they didn't).
The first was a coding test which I was completely unprepared for because THEY DIDN'T TELL ME. The test was modifying my coding-test app. I was lucky that the laptop I was using for the interview was the same one I wrote the original app on. However, I didn't have my normal presentation software installed (scrcpy...I don't use emulators), so I was a bit flustered with trying to get up and running. One of the interviews was pretty nice and supportive, but the other was late and seemed annoyed at having to talk with me. Both seemed a bit pretentious.
Second hour was with two guys that were nice. They had me design an API for an app using Google docs, which seemed like a strange test to give a front-end engineer.
The third interview was supposed to be with the hiring manager but he decided to pawn it off on someone else. She told me that Transcarent is currently utilizing Russian and Ukrainian contractors because they can't hire enough US employees (i.e. cheap labor).
The fourth interview was with the project manager, which was non-technical and more of a "how well do work with project managers".
Two days later the recruiter called me to tell me that I wouldn't get an offer. It was nice of them to tell me, considering most companies just ghost, but it could've been an email.
While I wasn't given a reason, I fully believe it was because I asked for too much money. Had they given me my minimum, they would've had lots of angry Flutter engineers if/when they found out how much I was making. However, these engineers are going to leave the company anyway once they get some experience and figure out they can make 40-50% more at other companies.